Long a go in the 60s in shop 101, the wrist pin of a crank was the pin that goes thru the big end of the connecting rod. If you google wrist pin now since you made me, it still does. Realize Harleys crank lobes are usually called wheels by me since they look more fly wheel like them lobes. My interest came anout this simply on a designer and machinest point locking and indexing the crank to prevent sissoring. Terry and I sent emails back and forth and he like you say is one cool dude to take his time in going into detail.

 

we call this style of locking "scotch keying" in Australia.
not used so much in Auto industry but in heavy fixed plant.
often drill and tap a thread and use a grub screw, loctited in..

 

And we call those Set screws here

 

Set screw here is a normal Allen key socket head bolt just with no shank, the thread gies all the way to the head, grub screw has no head, all thread with the female in hex for an Allen key...

 

Allen Socket head cap screw.. (usually grade 8 here in the US)
Allen set screw = (grub screw in UK) Quite often in the US on a fan in a heating system, the grub screw will have a square on it for those who do not have a set of Allen wrenches or maybe since that stuff gets all rusty and you can get it out if you are lucky with Vicegrip pliers.

 

Having talked to Terry Stewart The press fit on this is actually .009 Not .001.

 

What's a few thousands of an inch among friends?? HA.....

Actually, what I posted was from an email from him but sure it could have been updated since he is the racer and the technology is coming from the actual company that produces the the part. What I posted was from that email.
Don't have his email on my laptop and out of the country but how it was explained to me in email was too much press could result in a loss of dimensional accuracy do to shear rather then compression and could index the crank. The shape does the drive and of course the press holds it together somewhat. However, the finial squash is that oversize round pin that is pressed in the end that you see their signature engraved in. So, maybe what you are quoting is the total.
I was in the machine shop world for 46 years and .009 is a lot of press.

 

Crank looks good-only a handful actually out there running them at this time.
Wanna pay big bucks to be one of the first, with no results history of R&D/T&T/current/former users? Not me.

Run S&S and be done with it-move on to other areas of the motor and use the extra cash to make HP. I've run 200 HP on their standard crank/rods and over 225 N/A on S&S prostock crank/rods. NO ISSUES. Should be enough for most anyone posting here.

 

I am in the machine shop world for 35 years and you are right .009 is a lot of press.Below is the message I received from terry.

Hi Jerry.

I thought I would send you a private message to let you know that if you'd like to call me feel free. But I did want to let you know that the polygon is pressed in with a .009" interference fit !

 

The person that is trying to sell this pin, stole it from my friend and patented it behind my friends back. He is a thief. My friend Has the bike and test engine.